#include"mymath.h"

int myerror = 0;

int Add(int x, int y)
{
    return x + y;
}
int sub(int x, int y)
{
    return x - y;
}
int mul(int x, int y)
{
    return x * y;
}
int div(int x, int y)
{
    if (y != 0)
        return x / y;
    else
        myerror = 1;
        return -1;
}
